Tool-holder for metal-working machines.



80.629236. Patented July [8, I899.

- J. CARR.

TOOL HOLDER FOB METAL WORKING MACHINES.

(Applicltion filed m. 17, 1a99.j

{80 Model.)

UNITED STATES PATENT @FFICE.

JAMES CARE, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO THE HdGGSON & PETTISMANUFACTURING COMPANY, OF SAME PLACE.

TOOL-HOLDER FOR METAL-WORKING MACHINES.

SPECIFICATION forming part of Letters Patent No. 629,236, dated July 18,1899.

Apnlication filed March 1'7, 1899. Serial No. 709,428. (No model.)

To all whom it may concern.-

Be it known that I, JAMES CARR, of New Haven, in the county of New Havenand State of Connecticut, have invented a new Improvement inTool-Holders for Metal-Working Machines; and I do hereby declare thefollowing, when taken in connection with the accompanying drawings andthe letters of reference marked thereon, to be a full, clear, and exactdescription of the same, and which said drawing constitute part of thisspecification, and

embodying my invention and represented as containing a lathe orplaning-tool; Fig. 2, a similar view representingthe holder ascontaining a threading or cuttin g-off tool; Fig. 3, a transversesectional view through the center of the yoke shown in Fig. 1; Fig.4, asimilar sectional view of Fig. 2; Fig. 5, a plan .view of the groovedface of the tool-holding "shank; Fig. 6, a side view of the lathe orplaning-tool Fig. 7, a side view of the threading or cutting-off tool.

This invention relates to an improvement in tool-holders formetal-working machines,

and particularly to that class which comprise a shank having a groove orpassage in one side or through it for the reception of a cutting-tool,the object of the invention being to produce a simple construction andarrangement whereby the same holder is adapted to receive and'rigidlyhold tools diflferentiated in size; and it consists in the constructionand combination of parts, as will be hereinafter described, andparticularly recited in the to provide a cutting edge.

claim.

As usual in holders of this class my invention consists of a shank A,formed from a rectangular strip of steel andpreferably having its outerend B slightly offset, although this is not necessary or in some caseseven desirable. In one face of the outer end is a wide shallow groove 0,slightly less in depth than the thickness of a cutting-off or threadingtool D, which is usually constructed, as shown in Figs. 2, 4:, and 7,from a comparatively fiat piece of steel properly shaped at its outerend The outer end of the shank is also formed with a narrow deepdiagonal groove E, opening into the groove 0 and adapted to receive alathe or planing-tool F, which when in position will extend slightlybelow the face of the holder, as shown in Figs. 1 and 3. Preferably andas herein shown the upper face of the shank is slightly rounded,although this is not necessary and forms no part of this invention.

In order to hold the tools in position, I eniploy a yoke G,corresponding to and slightly larger than the shank and so as to setover the outer end thereof. This yoke is formed with a boss H at itstop, extending through which and the top of the yoke is a threadedopeningfor the reception of a set-screw I and sothat when in positionand a cutter in one of the grooves the screw may be turned inward, so asto clamp the yoke against the side of the cutter projecting beyond theface of the shank and so as to clamp the cutter in the holder. With adevice of this character it is only necessary to loosen the screw I inorder to adjust the cutters or to remove one and substitute the otherand so that the tools may be removed, adjusted, or exchanged withouttaking the holder out of the machine. Furthermore, the cutters are sotightly clamped in the holder and held so near the outer end thereofthat the cutters maybe used when quite short, sothat the life of acutter is ma terially extended. While the groove E is inclined in onedirection, it is apparent that it might be in clined in either,according to the position which the tool is to occupy. Therefore'l donot wish to be understood as limiting my invention to the exactconstruction shown.

I am aware that tool-holders have been constructed with two or moredifierentiated toolreceiving grooves, and I am also aware that aclamping-yoke has been employed around'the end of the tool-holder as ameans for clamping the tool in position, and therefore do not wish to beunderstood as claiming, broadly, such as my invention.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is-- A tool-holder having a wide shallow toolreceiving groove, and a deep narrow tool-re- 'ceiving groove, botharranged in one face of specification in the presence of twosubscribit-s shank and opening into each other, a yoke ing witnesses.surrounding the grooved end of the shank, CARR and provided with aset-screw whereby the yoke is clamped against a cutter placed in oneWVitnesses': I I

of the grooves; substantially as described. HARRY B. IKENNEDY Intestimony whereof I have signed this J. M. OOLGAN.

